How can I view changes in a table that changes monthly?

"The idea is that each month, it is easy to see what values have either decreased or increased from the month before hand at a glance."
Based on this I am proposing adding columns to each table that show the values from the previous month using:

Formula:

=IFERROR(INDEX(Table1[Value 1],MATCH($A2,Table1[[Item]:[Item]],0)),"N/A")

Let us know if you have any questions.

My idea is all data in one sheet with adding month column.
In some other column "G" extract unique item with formula "G3"

Formula:

=IFERROR(INDEX(Item,MATCH(0,COUNTIF($G$2:G2,Item),0)),"")

Horizontally value & month with formula "H3"

Formula:

=IFERROR(INDEX(Table1[Value 1],MATCH($G3&H$2,Table1[Item]&Table1[Month],0)),"")

In "L3"

Formula:

=IFERROR(INDEX(Table1[Value 2],MATCH($G3&L$2,Table1[Item]&Table1[Month],0)),"")

In "P3"

Formula:

=IFERROR(INDEX(Table1[Value 3],MATCH($G3&P$2,Table1[Item]&Table1[Month],0)),"")

paste up to certain column. Ensure press shift+ctrl+enter.
Look attach file.